If you can find an old discontinued Metro set, they were excellent reproductions, Mike Ross at BEAParts may still have some correct fitting repro corners/outer sections available you'll have to contact him personally to inquire, he may also have some originals pcs/sets?, in regards to some of the current offerings on the market they have a fatal flaw with the corners/outer sections being flared to accept to top/lower strips, however the upper/lower strips are usable.... I've seen a NEW offering on Ebay lately that appear correct in finish.... might want to scope them out?

Mike